Iron ore hematite is concentrated using ____________________?

Related Mcqs:

1. Which is the main reducing agent during production of iron from iron ore in a blast furnace ?

   A. C B. CO C. CO2 D. H2...

2. Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________?

   A. Hematite B. Magnetite C. Siderite D. Chalcopyrite...

3. ______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace?

   A. Bauxite B. Limestone C. Quartz D. Manganese...

4. Ore concentration by froth floatation utilises the ______________ of ore particles ?

   A. Density difference B. Wetting characteristics C. Terminal velocities D. None of these...

5. Which of the following is an ore of iron ?

   A. Galena B. Chalcopyrite C. Hematite D. Bauxite...

6. A mineral is termed as ‘ore’, if ____________________?

   A. A metal can be economically extracted from it B. It contains ≥ 40% metal C. The metal present in it is costly D. All A , B. and C....

7. Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?

   A. Reduction B. Roasting C. Calcination D. Smelting...

8. ___________________ iron is the purest form of iron?

   A. Cast B. Wrought C. Pig D. High silicon...

9. ______________ is an ore of lead?

   A. Quartz B. Galena C. Siderite D. Chalcopyrite...

10. ______________ is an ore concentrating metallurgical process involving a chemical change?

    A. Electromagnetic separation B. Froth floatation C. Roasting D. None of these...